[TASK] Add js files in TypeScript folder to .gitignore

Resolves: #78389
Releases: master
Change-Id: Ic022f1a19859cf48d92a1e50d45327c42ea7be21
Reviewed-on: https://review.typo3.org/50335


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Patricia Tiedemann <pixelaeffchen@googlemail.com>
Tested-by: Patricia Tiedemann <pixelaeffchen@googlemail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>